1 //===-- Support/DotGraphTraits.h - Customize .dot output -------*- C++ -*--===//
3 // This file defines a template class that can be used to customize dot output
4 // graphs generated by the GraphWriter.h file. The default implementation of
5 // this file will produce a simple, but not very polished graph. By
6 // specializing this template, lots of customization opportunities are possible.
8 //===----------------------------------------------------------------------===//
10 #ifndef SUPPORT_DOTGRAPHTRAITS_H
11 #define SUPPORT_DOTGRAPHTRAITS_H
15 /// DefaultDOTGraphTraits - This class provides the default implementations of
16 /// all of the DOTGraphTraits methods. If a specialization does not need to
17 /// override all methods here it should inherit so that it can get the default
20 struct DefaultDOTGraphTraits {
21 /// getGraphName - Return the label for the graph as a whole. Printed at the
24 static std::string getGraphName(void *Graph) { return ""; }
26 /// getNodeLabel - Given a node and a pointer to the top level graph, return
27 /// the label to print in the node.
28 static std::string getNodeLabel(void *Node, void *Graph) { return ""; }
30 /// If you want to specify custom node attributes, this is the place to do so
32 static std::string getNodeAttributes(void *Node) { return ""; }
34 /// If you want to override the dot attributes printed for a particular edge,
35 /// override this method.
36 template<typename EdgeIter>
37 static std::string getEdgeAttributes(void *Node, EdgeIter EI) { return ""; }
39 /// getEdgeSourceLabel - If you want to label the edge source itself,
40 /// implement this method.
41 template<typename EdgeIter>
42 static std::string getEdgeSourceLabel(void *Node, EdgeIter I) { return ""; }
44 /// edgeTargetsEdgeSource - This method returns true if this outgoing edge
45 /// should actually target another edge source, not a node. If this method is
46 /// implemented, getEdgeTarget should be implemented.
47 template<typename EdgeIter>
48 static bool edgeTargetsEdgeSource(void *Node, EdgeIter I) { return false; }
50 /// getEdgeTarget - If edgeTargetsEdgeSource returns true, this method is
51 /// called to determine which outgoing edge of Node is the target of this
53 template<typename EdgeIter>
54 static EdgeIter getEdgeTarget(void *Node, EdgeIter I) { return I; }
58 /// DOTGraphTraits - Template class that can be specialized to customize how
59 /// graphs are converted to 'dot' graphs. When specializing, you may inherit
60 /// from DefaultDOTGraphTraits if you don't need to override everything.
62 template <typename Ty>
63 class DOTGraphTraits : public DefaultDOTGraphTraits {};